[audio] Add zita-alsa-pcmi to better support raw alsa

3rdparty/zita-alsa-pcmi/zita-alsa-pcmi-ardour.h

@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2006-2022 Fons Adriaensen <fons@linuxaudio.org>
+ * Copyright (C) 2014-2022 Robin Gareus <robin@gareus.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ZITA_ALSA_PCMI_H_
+#define _ZITA_ALSA_PCMI_H_
+
+#define ALSA_PCM_NEW_HW_PARAMS_API
+#define ALSA_PCM_NEW_SW_PARAMS_API
+
+#include <ossia/audio/libasound.hpp>
+
+#include <alsa/asoundlib.h>
+
+#include <stdint.h>
+
+class Alsa_pcmi
+{
+public:
+ Alsa_pcmi (
+ const char* play_name,
+ const char* capt_name,
+ const char* ctrl_name,
+ unsigned int rate,
+ unsigned int frsize,
+ unsigned int play_nfrags,
+ unsigned int capt_nfrags,
+ unsigned int debug = 0);
+
+ ~Alsa_pcmi (void);
+
+ enum {
+ DEBUG_INIT = 0x001,
+ DEBUG_STAT = 0x002,
+ DEBUG_WAIT = 0x004,
+ DEBUG_DATA = 0x008,
+ DEBUG_ALL = 0x00f, // 15
+ FORCE_16B = 0x100, // 256,
+ FORCE_2CH = 0x200, // 512
+ TRY_INTLVD = 0x400, // 1024
+ };
+
+ void printinfo (void);
+
+ int pcm_start (void);
+ int pcm_stop (void);
+ int pcm_idle (int len);
+
+ snd_pcm_sframes_t pcm_wait (void);
+
+ int play_init (snd_pcm_uframes_t len);
+ void clear_chan (int chan, int len);
+ void play_chan (int chan, const float* src, int len, int step = 1);
+ int play_done (int len);
+
+ int capt_init (snd_pcm_uframes_t len);
+ void capt_chan (int chan, float* dst, int len, int step = 1);
+ int capt_done (int len);
+
+ int play_avail (void)
+ {
+ return snd_pcm_avail (_play_handle);
+ }
+
+ int capt_avail (void)
+ {
+ return snd_pcm_avail (_capt_handle);
+ }
+
+ int play_delay (void)
+ {
+ long k;
+ snd_pcm_delay (_play_handle, &k);
+ return k;
+ }
+
+ int capt_delay (void)
+ {
+ long k;
+ snd_pcm_delay (_capt_handle, &k);
+ return k;
+ }
+
+ float play_xrun (void) const { return _play_xrun; }
+ float capt_xrun (void) const { return _capt_xrun; }
+
+ int state (void) const { return _state; }
+ size_t fsize (void) const { return _fsize; }
+ uint32_t fsamp (void) const { return _fsamp; }
+
+ uint32_t play_nfrag (void) const { return _play_nfrag; }
+ uint32_t capt_nfrag (void) const { return _capt_nfrag; }
+
+ uint32_t nplay (void) const { return _play_nchan; }
+ uint32_t ncapt (void) const { return _capt_nchan; }
+
+ snd_pcm_t* play_handle (void) const { return _play_handle; }
+ snd_pcm_t* capt_handle (void) const { return _capt_handle; }
+
+private:
+ typedef char* (Alsa_pcmi::*clear_function) (char*, int);
+ typedef char* (Alsa_pcmi::*play_function) (const float*, char*, int, int);
+ typedef const char* (Alsa_pcmi::*capt_function) (const char*, float*, int, int);
+
+ enum { MAXPFD = 16,
+ MAXCHAN = 128 };
+
+ void initialise (const char* play_name, const char* capt_name, const char* ctrl_name);
+ int set_hwpar (snd_pcm_t* handle, snd_pcm_hw_params_t* hwpar, const char* sname, unsigned int nfrag, unsigned int* nchan);
+ int set_swpar (snd_pcm_t* handle, snd_pcm_sw_params_t* swpar, const char* sname);
+ int recover (void);
+ float xruncheck (snd_pcm_status_t* stat);
+
+ char* clear_32 (char* dst, int nfrm);
+ char* clear_24 (char* dst, int nfrm);
+ char* clear_16 (char* dst, int nfrm);
+
+ char* play_floatne (const float* src, char* dst, int nfrm, int step);
+ char* play_floatre (const float* src, char* dst, int nfrm, int step);
+ char* play_32le (const float* src, char* dst, int nfrm, int step);
+ char* play_24le (const float* src, char* dst, int nfrm, int step);
+ char* play_16le (const float* src, char* dst, int nfrm, int step);
+ char* play_32be (const float* src, char* dst, int nfrm, int step);
+ char* play_24be (const float* src, char* dst, int nfrm, int step);
+ char* play_16be (const float* src, char* dst, int nfrm, int step);
+
+ const char* capt_floatne (const char* src, float* dst, int nfrm, int step);
+ const char* capt_floatre (const char* src, float* dst, int nfrm, int step);
+ const char* capt_32le (const char* src, float* dst, int nfrm, int step);
+ const char* capt_24le (const char* src, float* dst, int nfrm, int step);
+ const char* capt_16le (const char* src, float* dst, int nfrm, int step);
+ const char* capt_32be (const char* src, float* dst, int nfrm, int step);
+ const char* capt_24be (const char* src, float* dst, int nfrm, int step);
+ const char* capt_16be (const char* src, float* dst, int nfrm, int step);
+
+ const ossia::libasound& snd = ossia::libasound::instance();
+ unsigned int _fsamp;
+ snd_pcm_uframes_t _fsize;
+ unsigned int _play_nfrag;
+ unsigned int _real_nfrag;
+ unsigned int _capt_nfrag;
+ unsigned int _debug;
+ int _state;
+ snd_pcm_t* _play_handle;
+ snd_pcm_t* _capt_handle;
+ snd_ctl_t* _ctrl_handle;
+ snd_pcm_hw_params_t* _play_hwpar;
+ snd_pcm_sw_params_t* _play_swpar;
+ snd_pcm_hw_params_t* _capt_hwpar;
+ snd_pcm_sw_params_t* _capt_swpar;
+ snd_pcm_format_t _play_format;
+ snd_pcm_format_t _capt_format;
+ snd_pcm_access_t _play_access;
+ snd_pcm_access_t _capt_access;
+ unsigned int _play_nchan;
+ unsigned int _capt_nchan;
+ float _play_xrun;
+ float _capt_xrun;
+ bool _synced;
+ int _play_npfd;
+ int _capt_npfd;
+ struct pollfd _poll_fd[MAXPFD];
+ snd_pcm_uframes_t _capt_offs;
+ snd_pcm_uframes_t _play_offs;
+ int _play_step;
+ int _capt_step;
+ char* _play_ptr[MAXCHAN];
+ const char* _capt_ptr[MAXCHAN];
+ clear_function _clear_func;
+ play_function _play_func;
+ capt_function _capt_func;
+ void* _dummy[16];
+};
+
+#endif

CMakeLists.txt

@@ -28,6 +28,7 @@ find_package(${QT_VERSION} COMPONENTS Core)
 ## the variable looks like : `/tmp/DpvCam/3rdparty/libossia/3rdparty;CACHE;STRING;;INTERNAL`
 ## which is a list instead of a single PATH value
 ## at least with CMake 15.2
+set(OSSIA_SOURCE_FOLDER "${CMAKE_CURRENT_SOURCE_DIR}" CACHE INTERNAL "")
 set(OSSIA_3RDPARTY_FOLDER "${CMAKE_CURRENT_SOURCE_DIR}/3rdparty" CACHE INTERNAL "")
 include(OssiaOptions)
 

cmake/deps/zita-alsa-pcmi.cmake

@@ -0,0 +1,15 @@
+if(OSSIA_USE_SYSTEM_LIBRARIES)
+ find_package(zita-alsa-pcmi CONFIG GLOBAL)
+endif()
+
+if(NOT TARGET zita-alsa-pcmi)
+ add_library(zita-alsa-pcmi STATIC
+ "${OSSIA_3RDPARTY_FOLDER}/zita-alsa-pcmi/zita-alsa-pcmi-ardour.cc"
+ "${OSSIA_3RDPARTY_FOLDER}/zita-alsa-pcmi/zita-alsa-pcmi-ardour.h"
+ )
+ target_include_directories(zita-alsa-pcmi
+ PRIVATE "${OSSIA_SOURCE_FOLDER}/src"
+ PUBLIC "${OSSIA_3RDPARTY_FOLDER}/zita-alsa-pcmi"
+ )
+endif()
+